Ruger Buffer Tube Kit Features The Ruger Buffer Tube Kit bundles the four core components needed to complete an AR-15 stock assembly a recoil spring castle nut end plate and carbine buffer saving a builder from sourcing each part separately. The phosphate finish on the components resists corrosion and wear helping the assembly hold up through repeated installation cycling and field use. Because the kit is built around a standard carbine length buffer tube it fits the wide range of AR-15 pattern stocks and components already on the market. Ruger backs this kit with the same engineering standards applied across its firearms lineup giving builders confidence in the fit and function of each part. Due to the wide variety of AR-15 pattern firearms and aftermarket components available Ruger recommends installation by a qualified gunsmith to ensure proper fit safety and function. This approach protects the builder from compatibility issues that can arise when mixing components from different manufacturers on a custom build. The complete kit arrives ready to install cutting down on the guesswork of matching individual buffer tube parts. For AR-15 owners assembling or upgrading a stock system the Ruger Buffer Tube Kit is available for sale at GrabAGun as a straightforward all in one solution. Ruger Buffer Tube Kit Specifications Manufacturer: Ruger Model: Buffer Tube Kit Type: Buffer Tube Complete Assembly Compatible Hosts: AR-15 Color: Black Material: Phosphate Includes: Recoil Spring Castle Nut End Plate Carbine Buffer Weight: 0.7 lbs Available At: GrabAGun